A huge hole in the ground on a flooded mine in Russia in the Urals city of Solikamsk - 4 max - shooting with flying robot

Hell. Shock. The horror. Nightmare. Huge failure of the mine where the accident occurred in November 2014 and it began to sink - video made in Russia in the Urals city of Perm Krai Solikamsk. the depth of the crater more than 100 meters. The video shows the gradual collapse of the boards. The video shows an explosion in the pit after the collapse. Near people live. The picture is taken with a flying robot - a very shocking and Head